Additionally, here is all the Black team Masters, not including the huge dude and the one next to him, who are Mordred's master and Mordred(?)

Supposedly:

Leftmost (Gordes): Summoned the Black Saber with a bloodstained leaf of a Sacred Fig tree as a catalyst (Siegfried). A gigantic douchebag (Not in the text).Second from left (Selenik): Summoned the Black Rider with a glass bottle which had a liquid stain left on it as a catalyst. Rather attached to Rider.Third from left (Danik): Black Lancer's Master. Catalyst not stated. Plundered the Holy Grail from the Third Holy Grail War of Fuyuki, is almost a century old despite looking in his 20s.Fourth from left (Fiore): An adorable girl assumed to be Danik's successor. Summoned the Black Archer using an ancient arrow as a catalyst (Atalanta).Fifth from left (Cowles?): Fiore's little brother, is immature and childish beneath his age. Summoned the Black Berserker, with the blueprints of the 'Ideal Human' as a catalyst (Frankenstein).Sixth from left (Rosie?): Thirteen-years-old, and already famous in the field of 'Doll Engineering'. Respectfully refers to the Black Caster she has summoned by 'Sensei', their relationship is close to that of a teacher-student. Spends all her time building golems in a workshop in the city for the Holy Grail War.Seventh is Reika or whatever from the prologue with Jackie.

Lastly is the talk of the supervisor of the war going by the name of 'SHIROU', caps are not my addition.